摘要
简要介绍了ArcHydro模型和提取步骤,以香格里拉县为西南横断山区典型实验区,利用ArcHydro模型,自动提取河网、流域、排水点水文信息,并提出利用线性回归模型辅助判断阈值选取。实验表明,提取结果与实际情况基本相符,当阈值为3 200时,河流总长度精度、河流条数精度分别达到了98%和84%。
Taking Shangri-La as a typical experimental area in southwestern Hengduan Moutains, the information of river network, basin and drain points from DEM were extracted by using Arc Hydro model. The process of extraction and Arc Hydro model were briefly introduced in this paper. Two simple linear regression models which help with threshold selection were also put forward in the essay. The result demonstrates that it 's corresponding compared with actual circumstances. When the threshold value is 3 200, the precisions of river length and number reach 98% and 84% respectively.
出处
《地理空间信息》
2014年第6期120-123,4-5,共4页
Geospatial Information
基金
国家自然科学基金资助项目(41261085)
国家科技支撑计划资助项目(2011BAD32B05)
